Tongue Weight Rating

lbrjet wrote:
This is my point. The hitch weight needs to be added to the TW against the receiver rating. I have never seen any literature saying that weight removed by the WDH should be subtracted from what should be applied against the receiver rating: hitch weight + tongue weight.

I've never seen any literature saying that load can be added to a receiver, but cannot be subtracted from a receiver.

You are considering only the loads which are added by tongue weight and WDH weight.
I am considering those loads and the load which is removed from the receiver via application of WD.

Application of WD does not reduce the tongue weight but, as far as vertical load on the receiver is concerned, it has the same effect as reducing the tongue weight.
If you want to say that "tongue weight" (as opposed to actual tongue weight) is equal to actual tongue weight plus the weight of the WDH minus load transferred to the TT, that's a matter of definition.
However, your "tongue weight", for any practical application of WD, still is going to be less than the actual tongue weight.

Ron